Building Automation & BMS Fundamentals
A free 16-lesson course on building management systems: sensors, controllers, control loops, schedules, trends, integration, network ownership and how to prove a BMS works at handover.
Start the courseHow a BMS thinks
- 1
What Is a Building Management System (BMS)? A Plain-Language Start
A BMS is a building's central nervous system: it senses conditions, decides against a target, and acts to run HVAC, lighting and pumps from one screen.
- 2
BMS Sensors and Actuators: A Building's Senses and Muscles
How BMS sensors and actuators work: the temperature, humidity, CO2 and flow sensors that see, and the valves, dampers and drives that move air and water.
- 3
Controllers, DDC and I/O Points: The Brain Behind the BMS
What is DDC (direct digital control)? A plain-language guide to controllers, the four I/O point types, point count, and why BMS control is distributed.
- 4
How Control Loops Work: Setpoints, Feedback and Closing the Loop
Learn how an HVAC control loop setpoint works: sense the value, compare it to a target, then act. Open-loop vs closed-loop, feedback and deadband explained.
- 5
PID Control Explained Simply: Why a Valve Overshoots, Hunts or Settles
PID control explained simply: how proportional, integral and derivative decide how hard a BMS pushes a valve, and why sloppy tuning makes a room keep swinging.
Running a building
- 6
What Is a Sequence of Operation in a BMS?
A sequence of operation is the plain-English recipe telling a BMS what runs when, in what order. Learn how interlocks, staging and modes unify a plant.
- 7
BMS Scheduling and Optimum Start: How a Building Wakes Itself Up
How a BMS uses time schedules, occupancy sensing and optimum start to pre-cool a building in time and stop cooling empty rooms — free savings in the tropics.
- 8
Trends, Alarms and Dashboards: The Operator's Window Into the Building
How a BMS shows operators the building through trend logs, alarms and dashboards, why alarm floods can bury the one that matters, and the override trap.
Connecting and owning it
- 9
BACnet vs Modbus: The Two Languages Building Equipment Speaks
Understand the BACnet vs Modbus difference in plain terms: self-describing data versus numbered registers, and why the choice shapes an open building.
- 10
Integrating Mixed-Vendor and Legacy Systems Into One BMS
How gateways, networks and protocol translation make a mixed-vendor, legacy building of chillers, meters and controllers behave as one coordinated BMS.
- 11
Who Owns the BMS Network? Access, Backups and Recovery
Who is responsible for a building's BMS network, how people should log in and connect remotely, what to back up, and what keeps running when the network fails, with a head-end recovery scenario.
Applying it
- 12
How a BMS Optimises the Chiller Plant: Staging and Temperature Reset
How a BMS sequences chillers and resets chilled-water and condenser-water temperatures to cut energy, so the same plant runs efficiently or wastefully.
- 13
How a BMS Runs the Air Side: VAV, Static Pressure Reset and Fresh Air
How a BMS delivers cooling to each zone with VAV boxes, static pressure reset and CO2-based fresh air control — the control side of comfort and air quality.
- 14
How a BMS Guards Your Electricity Bill: Load Shedding and Demand Limiting
How a BMS caps peak demand with load shedding, demand limiting, duty cycling and staggered starts — and why shaving peak kW saves real money under TNB RP4.
Finish
- 15
Proving the BMS Works: Commissioning and Handover
How to prove a BMS does what its sequence says: point checks, witnessed functional tests, an acceptance decision and the handover pack, worked through on one air handling unit with answers.
- 16
The Limits of a BMS: Where Control Ends and Analytics Begins
A BMS runs your building brilliantly right now, but rarely tells you if it has run well all year. Here's the honest line between control and analytics.